Lestari, Bq. Windriyani, et al. “The The Effect of Application Various Doses of Cow Manure and NPK (16:16:16) on Soil Properties and The Growth of Red Lettuce (Lactuca Sativa Var. Acephala)”. Jurnal Biologi Tropis, vol. 23, no. 4, Oct. 2023, doi:10.29303/jbt.v23i4.5587.